Adorable Animals Locking Lips (PHOTOS)

Spring fever takes its toll, indeed. Humans and animals alike might feel the urge to nuzzle up to one another as the warm weather approaches.

Similar to humans, some animals practice kissing for reassurance, out of excitement or to bond emotionally, according to the New York Post. Bonobo apes have been known to kiss and nibble at each other's lips for up to 12 minutes at a time. Other chimpanzees share quick smooches from time to time as well.

Some animals rub noses in order to show affection. Dogs and cats lick and groom each other as a display of friendship, Discovery reported.

Animals' kissing habits may spawn from mouth-feeding, according to Discovery, in which a mother chews up food and feeds it to her baby by mouth. Our human ancestors may have mouth-fed their infants as well. Humans and our fellow members of the animal kingdom may have made an unconscious association between the mouth and tenderness due to this intimate feeding practice.

While many animals do not show affection the way that humans do, the photos above sure look a lot like kissing. Click through for some adorable photos of animals sharing touching moments.